A house party spun out of control and drew a crowd estimated by police at 400 after a 16-year-old Plymouth Township girl was home alone while her family was in California.

One female party-goer was found unconscious, but breathing, and was taken to St. Mary Mercy Hospital in Livonia for treatment, a police report said.

Police Chief Tom Tiderington said word of the party likely spread on social media and left the teen host unable to control it. Party-goers fled in all directions when police arrived shortly after 12:30 a.m. Saturday at the Plymouth Country Club Village subdivision, near Ann Arbor Road and Napier.

"She wasn't supposed to have a party," Tiderington said, adding later, "A party can start out with five, 10, 20 people, but once it gets on Twitter or wherever, the house fills up quickly. Next thing you know, she can't do anything."

Police received several phone calls from neighbors reporting a large party and hundreds of vehicles. Police arrived to find a huge party in progress, a police report said.

Police knocked on the door and saw party-goers peeking through the blinds. Police turned their patrol car lights on the house and, according to the report, an estimated 300 teens fled "in all directions" through the door and windows.

Police found another 100 teens in the basement.

Police heard screaming inside the house when they initially arrived. They found someone described as a white female unconscious in the master bedroom and took her to the hospital.

Officers found dozens of empty liquor bottles and beer cans inside the house. The report said the smell of marijuana was so strong that police at times had to pause their investigation and go outside for fresh air.

The teen hosted the party while other family members were in California, the report said. Tiderington said a family friend came to the house to take charge.

The police report indicated the house was "destroyed" and had widespread damage, including a backyard grill and a fence.

Tiderington said police would be following up with the parents and deciding whether to issue any citations.